For the difficulty of getting a preferred basis in the unitary only MWI. I saw this message by Fredrik:(adsbygoogle = window.adsbygoogle || []).push({});

"If we just let it go, it seems very natural to me to (if we insist on trying to interpret QM as a description of the universe) postulate something like "every 1-dimensional subspace of the Hilbert space of the universe represents a world". Thiseliminatesthe preferred basis problem."

https://www.physicsforums.com/threads/the-many-worlds-interpretation-of-qm.676537/page-5

What is your objection to Fredrik solution that "every 1-dimensional subspace of the Hilbert space of the universe represents a world"?

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# B Preferred Basis solution in MWI

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